منابع مشابه
Constructing Time Machines *
The existence of time machines, understood as spacetime constructions exhibiting physically realised closed timelike curves (CTCs), would raise fundamental problems with causality and challenge our current understanding of classical and quantum theories of gravity. In this paper , we investigate three proposals for time machines which share some common features: cosmic strings in relative motio...
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Circuits are useful alternate characterization of computation that fundamentally differ from Turing machines in that, the former is a uniform model of computation whereas the later is not. This is quite serious a drawback of circuits since a circuit family might consist of members that radically differ from each other and hence impossible to implement in practice. On the other hand, Turing mach...
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In this paper, I discuss how the Boltzmann Machine framework can be used for modeling hybrid and modular architectures. The advantage is that it provides a rm theoretical basis for the derivation of learning rules in the presence of lateral inhibition, feed-forward and feedback .
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متن کاملTime Machines
A very short review of the time machine problem in physics is presented. First we consider basic knowledge of a time machine. Then we go through two different kinds of non-eternal time machine solutions. Further we explore two fundamental consequences of existence of time machine. And finally part of my recent work will be outlined. Introduction Time travelling point-like particle is represente...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics A
سال: 2003
ISSN: 0217-751X,1793-656X
DOI: 10.1142/s0217751x03015118